/**    
* @Title: AopTargetUtils.java  
* @Package com.kaver.utils   
* @author roc   
* @date 2019年7月23日 下午1:36:17  
* @version V1.0  
* @copyright kaver 
*/
package com.kaver.utils;

import java.lang.reflect.Field;

import org.springframework.aop.framework.AdvisedSupport;
import org.springframework.aop.framework.AopProxy;
import org.springframework.aop.support.AopUtils;

/**
 * @ClassName: AopTargetUtils
 * @Description: spring代理类
 * @author roc
 * @date 2019年7月23日 下午1:36:17
 * 
 */

public class AopTargetUtils {
	/**
	 * 获取 目标对象
	 * 
	 * @param proxy 代理对象
	 * @return
	 * @throws Exception
	 */
	public static Object getTarget(Object proxy) {
		if (!AopUtils.isAopProxy(proxy)) {
			return proxy;// 不是代理对象
		}
		if (AopUtils.isJdkDynamicProxy(proxy)) {
			return getJdkDynamicProxyTargetObject(proxy);
		} else { // cglib
			return getCglibProxyTargetObject(proxy);
		}
	}

	private static Object getCglibProxyTargetObject(Object proxy) {
		try {
			Field h = proxy.getClass().getDeclaredField("CGLIB$CALLBACK_0");
			h.setAccessible(true);
			Object dynamicAdvisedInterceptor = h.get(proxy);
			Field advised = dynamicAdvisedInterceptor.getClass().getDeclaredField("advised");
			advised.setAccessible(true);
			Object target = ((AdvisedSupport) advised.get(dynamicAdvisedInterceptor)).getTargetSource().getTarget();
			return target;
		} catch (Exception e) {
			return null;
		}

	}

	private static Object getJdkDynamicProxyTargetObject(Object proxy) {
		try {
			Field h = proxy.getClass().getSuperclass().getDeclaredField("h");
			h.setAccessible(true);
			AopProxy aopProxy = (AopProxy) h.get(proxy);
			Field advised = aopProxy.getClass().getDeclaredField("advised");
			advised.setAccessible(true);
			Object target = ((AdvisedSupport) advised.get(aopProxy)).getTargetSource().getTarget();
			return target;
		} catch (Exception e) {
			return null;
		}

	}
}
